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mmc: sdhci: add hooks for setting UHS in platform specific code
Allow platform specific code to set UHS registers if implementation requires speciial platform specific handling Signed-off-by: Philip Rakity <prakity@marvell.com> Reviewed-by: Arindam Nath <arindam.nath@amd.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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@ -1346,8 +1346,16 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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sdhci_set_clock(host, clock);
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}
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ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
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/* Reset SD Clock Enable */
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clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
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clk &= ~SDHCI_CLOCK_CARD_EN;
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sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
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if (host->ops->set_uhs_signaling)
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host->ops->set_uhs_signaling(host, ios->timing);
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else {
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ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
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/* Select Bus Speed Mode for host */
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ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
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if (ios->timing == MMC_TIMING_UHS_SDR12)
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@ -1360,13 +1368,8 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
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else if (ios->timing == MMC_TIMING_UHS_DDR50)
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ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
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/* Reset SD Clock Enable */
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clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
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clk &= ~SDHCI_CLOCK_CARD_EN;
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sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
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sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
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}
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/* Re-enable SD Clock */
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clock = host->clock;
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@ -270,6 +270,8 @@ struct sdhci_ops {
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unsigned int (*get_ro)(struct sdhci_host *host);
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void (*platform_reset_enter)(struct sdhci_host *host, u8 mask);
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void (*platform_reset_exit)(struct sdhci_host *host, u8 mask);
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int (*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
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};
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#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
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